What is the mole fraction of #NaCl# if 117 g of it is dissolved in 180 mL of water?

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Answer 1 · 2017-04-17T00:25:04

16.83 M

For this we'd use the following equation:

#Molarity = N/V#

N meaning the grams/moles and V meaning the volume in Liters.

So first we find the molar mass of NaCl to be 58.44 grams.

we can setup this proportion to find the 'n'

#x/117= 1/58.44#

#177/58.44=#3.03

Now we convert the 180 mL to L, so .180 L.

Finally,

#M= 3.03/.180#

M=16.83

The molarity (mole fraction) is 16.83 Molar